Re: [sqlalchemy] hybrid_property returning a python type

2013-07-29 Thread Matthew Pounsett
On Thursday, 25 July 2013 11:39:23 UTC-4, Michael Bayer wrote: But your backend isn't doing this; if you were using Postgresql for example, it should be returning a timedelta() already. So perhaps this is MySQL. you'd need to make a TypeDecorator that receives this integer and does

Re: [sqlalchemy] hybrid_property returning a python type

2013-07-29 Thread Matthew Pounsett
On Monday, 29 July 2013 20:48:57 UTC-4, Matthew Pounsett wrote: I think I understand the mechanism here... except that since this isn't a real type (there's no data store behind this) is process_bind_param() useful at all? To answer my own question... yes, of course it does because it

[sqlalchemy] hybrid_property returning a python type

2013-07-25 Thread Matthew Pounsett
I have a class with 'start' and 'finish' attributes which are DateTime columns. I'm trying to create a hybrid property 'duration' which returns the delta as a datetime.timedelta object. This is working fine for the instance attribute, but I can't seem to get it to work for the class

Re: [sqlalchemy] hybrid_property returning a python type

2013-07-25 Thread Michael Bayer
On Jul 25, 2013, at 2:44 AM, Matthew Pounsett matt.pouns...@gmail.com wrote: I have a class with 'start' and 'finish' attributes which are DateTime columns. I'm trying to create a hybrid property 'duration' which returns the delta as a datetime.timedelta object. This is working fine for